Measuring Earth's Circumference With A Stick

Measuring Earth's circumference with a stick (in 245 BC)

How Eratosthenes calculated the Earth's circumference

Business Insider

Carl Sagan explains how Eratosthenes calculated circumference of the Earth

Measuring Earth Circumference With Just a Stick 😳

How to Measure Earth?

Saturday Morning Astrophysics at Purdue

How did Eratosthenes calculate the circumference of the Earth?

Calculating The Circumference Of The Earth (Mr. Wizard)

Official Mr.Wizard's World Channel

He measured the size of the Earth using two sticks.

Using 2 Sticks to Calculate the Circumference of the Earth - Astrobreaks with Spaceman Steve

How to measure earth's circumference in one stick

Unknown Mystery

Just one stick can calculate the circumference of the earth of ancient people - Discovery Channel

Discovery Channel

Science at home Episode 17 - Measuring the Circumference of Planet Earth!!

Midlands Science

How I Proved the Earth is Round (with my Bike and Two Sticks)

Measure the Earth’s Radius! (with this one complicated trick)

How can we measure the circumference of the Earth using two sticks??

NASA - How To Measure Earth's Circumference (ENG)

Calculate the circumference of the Earth with two sticks? Eratosthenes

UnderstandingMath

Carl Sagan - Cosmos - Eratosthenes

carlsagandotcom

North Woods Scientist Measuring Circumference of Earth

Bob the Science Guy

Finding the circumference of the earth using a stick and some shadows

Randall Deschler